/* nag_prob_chi_sq (g01ecc) Example Program.
 *
 * Copyright 1990 Numerical Algorithms Group.
 *
 * Mark 1, 1990.
 */

#include <nag.h>
#include <stdio.h>
#include <nag_stdlib.h>
#include <nagg01.h>

int main(void)
{
  double df, prob, x;
  static NagError fail;

  /* Skip heading in data file */
  Vscanf("%*[^\n]");
  Vprintf("nag_prob_chi_sq (g01ecc) Example Program Results\n");
  Vprintf("  x      df     prob\n\n");
  while (scanf("%lf %lf", &x, &df) != EOF)
    {
      /* nag_prob_chi_sq (g01ecc).
       * Probabilities for chi^2 distribution
       */
      prob = nag_prob_chi_sq(Nag_LowerTail, x, df, &fail);
      if (fail.code==NE_NOERROR)
        Vprintf("%6.3f%8.3f%8.4f\n", x, df, prob);
      else
        {
          Vprintf("%6.3f%8.3f%8.4f\n Note: %s\n", x, df, prob, fail.message);
          return EXIT_FAILURE;
        }
    }
  return EXIT_SUCCESS;
}